Excitation Systems in Synchronous Generators: Importance and Trends
Excitation voltage regulators provide precise voltage adjustment to maintain grid stability. An Excitation Voltage Regulator (EVR), often called an Automatic Voltage Regulator (AVR), is a key device in a synchronous generator system that maintains a constant output voltage by regulating the generator’s excitation current. It ensures stable voltage for connected loads and the power grid, even under fluctuating load conditions.
Purpose of an Excitation Voltage Regulator
Voltage Stabilization: Keeps the generator terminal voltage within specified limits.
Reactive Power Control: Helps manage reactive power, supporting system power factor.
System Protection: Prevents overvoltage or undervoltage conditions that could damage equipment.
Grid Compatibility: Ensures the generator voltage matches the grid or load requirements for synchronization.